OpenRouter Offers Single API Key Access to 300+ AI Models at Provider Prices

OpenRouter is a unified API gateway that lets developers access over 300 large language models from providers like Anthropic, OpenAI, Google, Meta, and DeepSeek using a single API key and credit balance. Users can switch between models by changing one parameter, with no new integrations or separate billing accounts required. The platform is compatible with the OpenAI SDK, meaning existing code requires only a base URL and API key change to work. OpenRouter charges a flat 5.5% fee on credit purchases and passes through provider token prices at cost, replacing an older per-token markup model. Free accounts receive up to 50 requests per day, with access to roughly 29 free models including Llama 3, Gemma 4, and DeepSeek Flash for prototyping purposes.
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